package com.zfj.controller;

import com.zfj.entities.Payment;
import com.zfj.lb.LoadBalancer;
import com.zfj.result.CommonResult;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @author zfj
 * @date 2022/5/10 -19:30
 */
@RestController
@Slf4j
public class OrderController {

//	public static final String PAYMENT_URL="http://localhost:8001";
	public static final String PAYMENT_URL="http://CLOUD-PAYMENT-SERVICE";

	@Resource
	private RestTemplate restTemplate;

	@Resource
	private LoadBalancer loadBalancer;

	@Resource
	private DiscoveryClient discoveryClient;

	@GetMapping("/consumer/payment/create")
	public CommonResult<Payment> creat(Payment payment){
		return restTemplate.postForObject(PAYMENT_URL+"/payment/creat",payment,CommonResult.class);
	}

	//返回对象未响应体中数据转化成对象，基本上可以理解为Json
	@GetMapping("/consumer/payment/get/{id}")
	public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
		return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
	}

	//返回对象为ResponseEntity对象，包括相应中的一些重要信息，比如响应头，相应状态码，响应体
	@GetMapping("/consumer/payment/getForEntity/{id}")
	public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
		ResponseEntity<CommonResult> entity=restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
		if(entity.getStatusCode().is2xxSuccessful()){
			return entity.getBody();
		}else {
			return new CommonResult<>(444,"操作失败");
		}
	}

	@GetMapping("/consumer/payment/lb")
	public String getPaymentLB(){
		List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
		if(instances==null || instances.size()<=0){
			return null;
		}
		ServiceInstance serviceInstance=loadBalancer.instances(instances);
		URI uri = serviceInstance.getUri();
		return restTemplate.getForObject(uri+"/payment/lb",String.class);
	}


	//zipkin+sleuth
	@GetMapping("/consumer/payment/zipkin")
	public String PaymentZipkin(){
		return restTemplate.getForObject("http://localhost:8001"+"/payment/zipkin",String.class);
	}

}
